No petition shall be accepted by the Hearing Board for filing
which does not comply with these rules relating to the
form, filing and service of petitions, unless the chairman or any
two members of the Hearing Board direct otherwise and confirm
such direction in writing. Such direction need not be made at
a meeting of the Hearing Board. The chairman or any two
members, without a meeting, may require the petitioner to
state further facts or reframe a petition so as to disclose
clearly the issues involved.